PCBT/MWCNT nanocomposites prepared by in situ polymerization of CBT after solid-phase high-energy ball milling of CBT with MWCNT

Gábor Romhány, János Vígh, Ralf Thomann, Jõzsef Karger-Kocsis, István E. Sajõ

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25 Citations (Scopus)

Abstract

pCBT/MWCNT nanocomposites were prepared by in situ polymerization of CBT after solid-phase HEBM of the polymerization catalyst containing CBT with MWCNT. The crystallinity and crystallization behavior of the pCBT nanocomposites were studied by WAXS and DSC. The MWCNTs did not affect the crystallinity of the isothermally produced pCBT significantly, but acted as nucleation agents during the crystallization of pCBT from its melt. pCBT/MWCNT nanocomposites were subjected to DMTA, static flexure, and dynamic Charpy impact tests. The flexural modulus, strength, and impact strength from these tests all went through a maximum as a function of the MWCNT content. Optimum properties were found in the MWCNT range of 0.25-0.5 wt.-%. MWCNTs were incorporated in ready-to-polymerize CBT powder via HEBM. The morphology of the MWCNT-modified polymerized CBT was assessed using DSC, WAXS, and TEM. The nanocomposites were subjected to DMTA, static flexural, and dynamic Charpy impact tests. It was demonstrated that solid phase HEBM is an efficient way to disperse the carbon nanotubes individually. Optimum mechanical properties were found for the nanocomposites between 0.25 and 0.5wt.-% MWCNT contents.

Original languageEnglish
Pages (from-to)544-550
Number of pages7
JournalMacromolecular Materials and Engineering
Volume296
Issue number6
DOIs
Publication statusPublished - Jun 16 2011

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Keywords

  • crystallization
  • cyclic butylene terephthalate
  • multiwalled carbon nanotubes
  • nanocomposites
  • solid phase high-energy ball milling

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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